Motor Paint; Motor Cooling; Fan - Bosch Rexroth MAD Project Planning Manual

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Application notes
Output shaft at bottom
9.7

Motor paint

Resistance
Additional paint
9.8

Motor cooling

9.8.1

Fan

Bosch Rexroth AG R911295781_Edition 11
If motors of frame size 225 are operated in vertical installation position with
the output shaft positioned at the bottom and in connection with a coupling,
the coupling has to be selected such that
● the axial pretension force of the coupling is not higher than max. 400 N
in the pretensioned state.
Color Black (RAL9005)
Resistant against
● Diluted acids/lyes
● Water, seawater, sewage
● Current mineral oils
Resistant to a limited degree against
● Organic solvents
● Hydraulic oil
Not resistant against
● Concentrated acids/lyes
Allowed for:
Standard products.
The housing may be painted with a coating thickness of no more than 40 µm.
Before painting the housing, check the adhesiveness and resistance of the
new paint.
NOT allowed for:
Products for potentially explosive atmospheres.
Ex-type motors may not be repainted to ensure that there will be no negative
effects on surface properties (e.g., insulation resistance, electrostatic charg‐
ing).
If motors are repainted, all safety labels, type plates and open
plug connectors have to be covered to be protected against paint‐
ing.
MAD motors may only be operated with a fan. These motors are cooled via
air currents which are guided across the surface of the motor by air baffles.
The fan is designed to use clean air from its surroundings to cool the motor. If
the motors are used in heavily soiled areas, special precautions have to be
taken. Please also observe the guidelines in
in heavily soiled atmospheres" on page 198
It is explicitly prohibited to use the fan under the following conditions:
● Delivery of air which contains abrasive particles
● Delivery of air which has a strongly corroding effect, e.g., salt mist
● Delivery of air which contains a high dust load, e.g., extraction of saw
dust
MAD / MAF Asynchronous Housing Motors
chapter 9.8.2 "Radial ventilation
in this context.